Fitting Square Fit

The term fitting, is related to assembly of parts, after bringing the dimension or shape to the required size or form, in order to secure the necessary fit. The operations required for the same are usually carried out on a work bench, hence the term bench work is also added with the name fitting.
The bench work and fitting plays an important role in engineering. Although in today's industries most of the work is done by automatic machines which produces the jobs with good accuracy but still it (job) requires some hand operations called fitting operations. The person working in the fitting shop is called fitter
SQUARE FIT
AIM: To make a Square fit from the given mid steel pieces.
MATERIALS REQUIRED: mild steel flat (40*40*3mm).
TOOLS AND EQUIPMENT REQUIRED:
1.6”try square
2. 6”sriber
3. Odd leg caliper
3.12”hack saw Frame
4 Blades (12 TPI)
5. 10”rough file
6. 10”smooth file
7. 10”Square file
8. Dot punch
9. Ball peen hammer (0.5 Ib).
10. Steel Rule
Sequence of OPERATIONS:
1. Filling
2. Marking
3. Punching
4. Sawing
5. Filling
6. Finishing
PROCEDURE:
1. The given mild steel flat piece is checked for given dimensions.
2. One edge of given is filled to straightness with rough and smooth files and checked with try square.
3. An adjacent is also filled such that is square to first edge and checked with try square.
4. Wet chalk is applied on one side of the flat and dried for making.
5. Lines are marked according to given figure, using odd leg caliper and steel rule.
6. using the dot punch are made along the marked lines.
7. The excess materials removed from the remaining two edges with try square level up to half of the marked dots.
8. Finally buts are removed by the filling on the surface of the fitted job.
PRECAUTIONS:
1. The perpendicularity of face ends edges is checked perfectly by using try square.
2. Finishing is given by using only with smooth files.
3. Marking is done without parallax error.
RESULT: The Square cutting is done successfully

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